Nothing has changed, I still see them when I can, the only difference is, I still have the same level of connection with these guys as I did 26 months ago. While they all have built deep emotional bonds. How did they all do that? What are the feelings, actions and motivation behind there deeper bonding? It seemed natural to them. They new how to do it like it was there nature.(...) In the two examples I gave above all of my acquaintances had a certain nature that I did not. They were all doing the same thing, in the same way.
The following is my NT perspective, from personal experience, and from readings. I don't mean to over-generalize, I only have known a few Aspies in real life... Obviously there are introvert loners among NTs, and there are Aspies who have built strong social networks around them. But to me, on average, NTs tend to naturally act and interact in ways that allow connections to form and deepen overtime if they want it to. Not because they are all alike in *who* they are personality-wise and taste-wise, but because they share a "default setting" in *how* they connect, and that "default setting" isn't the same among Aspies. A difference in our very nature, as you say.
NTs get to know each other through talking, sharing experiences, doing things and spending time together one on one. Overtime they grow closer, each person has put a certain amount of "focus" on the other, they have both felt enriched/energized/comforted by the other person's presence and their shared time. They communicate both in verbal and non-verbal language.
Aspies' high need for alone time make them "less available" to share experiences/do things one on one with others. They often talk less, have less non-verbal expression and don't always "get" an NT's non-verbal expression.
Aspies don't seem as naturally prone or "able" to put the same "focus" on another person as NTs do, and tend to "initiate" less often. The presence of others tend to drain/tire them even when they are having fun (I know this part varies, some Aspies get drained even with their significant other, children and close friends, while it isn't as tiring for others, etc.).
It probably takes much longer for Aspies to feel like they really know a person, and in my experience, it takes much longer to really know an Aspie. As a consequence, Aspies seem more distant, and this can naturally lead NTs to think that their Aspie friends are less interested in their shared activities, or don't find them as enjoyable, etc. So they may invite them less. (I would illustrate with real-life examples from a group of friends with a majority of NT and a minority of Aspies, but my comment is already quite long...)